Lubrication of cross-heads.



PATENTED JAN. 14, 1908.

LLJOHNSON. LUBRIGATION 0F oaoss HEADS.

APPLICATION FILED AUG.1, 1907.

51 noon to r, 70227$ 30/953622;

wit" aooea UNITED STATES PATENT OFFICE.

JAMES JOHNSON, OF FLOREFFE, PENNSYLVANIA.

LUBRICATION OF CROSS-HEADS.

Specification of Letters Patent.

Patented Jan. 14, 1908.

"Application filed August 1. 1907. Serial No. 386.594-

heads, and more particularly to means for lubricating a cross-head, and elements connected thereto. a

The invention consists in the formation of oil ducts, in a cross-head, and the pitmanconnecting pin forming a part thereof, and the construction of the improvement will be fully described hereinafter in connection with the accompanying drawing which forms a part of this specification.

In the drawing, Figure 11s a side elevation of a cross-head. supported in its guide-bars and showing its oil duct plugged by a screw, Fig. 2 is a top plan'of the cross-head removed from its guides, Fig. 3'is a vertical section on the line m:r, of'Fig. 1., and Fig. 4 is a transverse vertical section on the line 'y-'y of Fig. 2.

The reference numeral 1 designates the cross-head which in general construction is of a well known type, and Supported by four guide-bars 2, connected by guide-blocks 3. The usual guide-yoke 4 is employed, and the parallel -sides 5 and 6 of the cross-head are connected by an integral cross-pin 7 to which the pitman 8 is connected;

The pitman-connecting pin 7 i and the sides 5 and 6 of the cross-head adjacent thereto are bored to provide an oil duct 9, the ends of which are closed by screw-plugs 10. The cross-pin 7 is also -formed at its center with a vertical oil passage 11 communicating with the oil duct 9, and the sides 5 and 6 of the cross-head are formed with vertical oil passages 12, also communicating with the horizontal oil duct 9. The upper surfaces of the sides of the cross-head are each formed with irregular grooves 13 and 14, said grooves being preferably in the form of compound curves as shown, crossing each other centrally where they communicate with the oil passage 12, and also at the point 15 adjacent to the ends of the grooves. The upper guide-bars 2 are formed with oil holes 16 for supplying oil to the upper surfaces of the cross-head. The cross-head is provided with the usual piston connecting rod 17.

scribed will be readily understood. Lubricant supplied tothe upper surfaces of the cross-head fills the grooves 13 and 1.4, and passes down through thepassag'es 12 to the oil duct 9, from whence it feeds upward through the passage 11 tolubricate the pitman-connecting pin 7. This circulation of the oil insures an effective lubrication of the cross-head and the pitman-connection.

with the passage extending transversely through the cross head, the upper face of the cross head provided with compound curved ing point with the vertical passages in the cross head.

In testimony whereof I affix y signature in the presence of two witness s.

JAMES "JOHNSON;

Witnesses AARON LYTLE,

'I SAIAH CUsHEY.

The utility of the construction above de-" llavingnow described my invention, what having vertical passage also communicating grooves, the said grooves crossing each other sectionally and 'c-ommunlcatlng at their cross- 

